2 * Copyright (C) 2011-2012 ARM Limited. All rights reserved.
4 * This program is free software and is provided to you under the terms of the GNU General Public License version 2
5 * as published by the Free Software Foundation, and any use by you of this program is subject to the terms of such GNU licence.
7 * A copy of the licence is included with the program, and can also be obtained from Free Software
8 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
11 #include "mali_mem_validation.h"
13 #include "mali_kernel_common.h"
16 #if defined(CONFIG_CPU_EXYNOS4212) || defined(CONFIG_CPU_EXYNOS4412)
17 #define MALI_SEC_MEM_VALIDATION
18 #include <linux/cma.h>
20 #include <linux/platform_device.h>
24 #define MALI_INVALID_MEM_ADDR 0xFFFFFFFF
27 u32 phys_base; /**< Mali physical base of the memory, page aligned */
28 u32 size; /**< size in bytes of the memory, multiple of page size */
29 } _mali_mem_validation_t;
32 #if defined(MALI_SEC_MEM_VALIDATION)
33 extern struct platform_device exynos4_device_pd[];
36 static _mali_mem_validation_t mali_mem_validator = { MALI_INVALID_MEM_ADDR, MALI_INVALID_MEM_ADDR };
38 _mali_osk_errcode_t mali_mem_validation_add_range(u32 start, u32 size)
41 #if defined(MALI_SEC_MEM_VALIDATION)
42 struct cma_info mem_info;
45 /* Check that no other MEM_VALIDATION resources exist */
46 if (MALI_INVALID_MEM_ADDR != mali_mem_validator.phys_base) {
47 MALI_PRINT_ERROR(("Failed to add frame buffer memory; another range is already specified\n"));
48 return _MALI_OSK_ERR_FAULT;
52 #if defined(MALI_SEC_MEM_VALIDATION)
53 if (cma_info(&mem_info, &exynos4_device_pd[PD_G3D].dev, "fimd")) {
54 MALI_PRINT_ERROR(("Failed to get framebuffer information from CMA\n"));
55 return _MALI_OSK_ERR_FAULT;
57 start = mem_info.lower_bound;
58 size = mem_info.total_size - mem_info.free_size;
62 /* Check restrictions on page alignment */
63 if ((0 != (start & (~_MALI_OSK_CPU_PAGE_MASK))) ||
64 (0 != (size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
65 MALI_PRINT_ERROR(("Failed to add frame buffer memory; incorrect alignment\n"));
66 return _MALI_OSK_ERR_FAULT;
69 mali_mem_validator.phys_base = start;
70 mali_mem_validator.size = size;
71 MALI_DEBUG_PRINT(2, ("Memory Validator installed for Mali physical address base=0x%08X, size=0x%08X\n",
72 mali_mem_validator.phys_base, mali_mem_validator.size));
74 return _MALI_OSK_ERR_OK;
77 _mali_osk_errcode_t mali_mem_validation_check(u32 phys_addr, u32 size)
79 if (phys_addr < (phys_addr + size)) { /* Don't allow overflow (or zero size) */
80 if ((0 == ( phys_addr & (~_MALI_OSK_CPU_PAGE_MASK))) &&
81 (0 == ( size & (~_MALI_OSK_CPU_PAGE_MASK)))) {
82 if ((phys_addr >= mali_mem_validator.phys_base) &&
83 ((phys_addr + (size - 1)) >= mali_mem_validator.phys_base) &&
84 (phys_addr <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) &&
85 ((phys_addr + (size - 1)) <= (mali_mem_validator.phys_base + (mali_mem_validator.size - 1))) ) {
86 MALI_DEBUG_PRINT(3, ("Accepted range 0x%08X + size 0x%08X (= 0x%08X)\n", phys_addr, size, (phys_addr + size - 1)));
87 return _MALI_OSK_ERR_OK;
92 MALI_PRINT_ERROR(("MALI PHYSICAL RANGE VALIDATION ERROR: The range supplied was: phys_base=0x%08X, size=0x%08X\n", phys_addr, size));
94 return _MALI_OSK_ERR_FAULT;